Overview of Predictive Simulation Capability Development for Crater Evolution and Ejecta in Continuum/Rarefied Flows

2022 ◽  
Author(s):  
Andrew B. Weaver ◽  
William C. Krolick ◽  
Peter A. Liever ◽  
Jeffrey West
Keyword(s):  
Capability Development ◽  
Predictive Simulation ◽  
Rarefied Flows

Explicit formulations of G13-based gas kinetic flux solver (G13-GKFS) for simulation of continuum and rarefied flows

2021 ◽  
Vol 33 (3) ◽  
pp. 037133
Author(s):  
Z. J. Liu ◽  
L. M. Yang ◽  
C. Shu ◽  
S. Y. Chen ◽  
M. P. Wan ◽  
...  
Keyword(s):  
Rarefied Flows

scholarly journals The Knudsen Paradox in Micro-Channel Poiseuille Flows with a Symmetric Particle

2020 ◽  
Vol 11 (1) ◽  
pp. 351
Author(s):  
Ananda Subramani Kannan ◽  
Tejas Sharma Bangalore Narahari ◽  
Yashas Bharadhwaj ◽  
Andreas Mark ◽  
Gaetano Sardina ◽  
...  
Keyword(s):  
Flow Behavior ◽  
Direct Simulation Monte Carlo ◽  
Micro Channel ◽  
Confined Geometries ◽  
Rarefied Flows ◽  
Model Pore ◽  
Duct Geometry ◽  
Transport Effects ◽  
Non Local ◽  
Simulation Monte Carlo

The Knudsen paradox—the non-monotonous variation of mass-flow rate with the Knudsen number—is a unique and well-established signature of micro-channel rarefied flows. A particle which is not of insignificant size in relation to the duct geometry can significantly alter the flow behavior when introduced in such a system. In this work, we investigate the effects of a stationary particle on a micro-channel Poiseuille flow, from continuum to free-molecular conditions, using the direct simulation Monte-Carlo (DSMC) method. We establish a hydrodynamic basis for such an investigation by evaluating the flow around the particle and study the blockage effect on the Knudsen paradox. Our results show that with the presence of a particle this paradoxical behavior is altered. The effect is more significant as the particle becomes large and results from a shift towards relatively more ballistic molecular motion at shorter geometrical distances. The need to account for combinations of local and non-local transport effects in modeling reactive gas–solid flows in confined geometries at the nano-scale and in nanofabrication of model pore systems is discussed in relation to these results.

Privatisation and manpower capability development

2011 ◽  
Vol 18 (5) ◽  
pp. 497-515 ◽  
Author(s):  
Omran Elgrari ◽  
Bingunath Ingirige
Keyword(s):  
Capability Development
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